Loom-shuttle.



' L V. GUN'N1PP @L 0. RAPPERTY.

LOOM SHUTTLE.

APPLICATION .FILED 00T. 19, 1Q08.

955,583. Patented Apr. 19,1910.

In un I UNITED STATES PATENT oEEioE.

JOHN V. CUNNIFF AND CHARLES RAFFERTY, 0F FALL RIVER, MASSACHUSETTS.

LOOM-SHUTTLE.

Specification of Letters Patent.

Application filed October 19, 1908.

Patented Apr. 19, 1910.

Serial No. 458,487.

To all whom it may concern:

Be it known that we, JOHN V. CUNNIEF and CHARLES RAEFERTY, citizens ofthe United States, residing at Fall River, county of Bristol, and Stateof Massachusetts, have invented a new and useful Improvement inLoom-Shuttles, of which t-he following is a specication.

This invention has reference to an improvement in loom shuttles and moreparticularly to an improvement in the construction of spindle springholding mechanisms of loom shuttles.

The object of our invention is to improve the construction of a loomshuttle, whereby the spindle is held more securely under spring tensionin the shuttle than has heretofore been done, thereby eliminating theliability of the spindle jumping out of the shuttle and smashing thewarp threads .of the loom.

Our invention consists in the peculiar and novel construction of a loomshuttle having a iiat spring bearing on the top of the spindle heel, aflat spring having a projection bearing on the bottom of the spindleheel, a lip adapted to engage with the usual annular groove in the headof the bobbin, and details of construction as will be more fully setforth hereinafter and claimed.

Figure 1 is a top plan view of the spindle Spring end of a loom shuttleprovided with our improvement. Fig. 2 is a bottom plan view of thespindle spring end of the shuttle. Fig. 3 is a vertical longitudinalsectional view taken on line 3 3 of Fig. l, and Fig. 4 is an edge viewof a modied form of locking spring.

In the drawings, a indicates the spindle spring end of a loom shuttlebody, b the spindle, c the bobbin, Z the upper spindle spring, and e thelower spindle and bobbin locking spring.

The spindle spring end of the shuttle body a is constructed to have anLipper recess 5 shaped to receive the upper spindle spring d andextending into the bobbin cavity 6, a lower recess 7 shaped to receivethe locking spring e and extending into the bobbin cavity 6, and anopening 8 connecting the recesses 5 and 7 and opening into the bobbincavity 6 for the heel 9 of the spindle, as shown in Fig. 3, otherwisethe shuttle body may have the construction of any of the well knownforms of loom shuttles.

The spindle b has the heel 9 adapted to t in the opening 8 in theshuttle body and shaped to have an upwardly-extending o center portion10, a fiat bottom 11 which with the back of the heel forms an off-centerbottom portion 12, and a transverse hole 13 by which the heel of thespindle is pivotally secured in the opening 8 by a pin 14 driven throughthe hole 13 and the shuttle body, as shown in Fig. 3.

The bobbin c has the usual head 15 in which is an annular groove 16, asshown in Figs. 1 and 3.

The upper spindle spring Z is shaped to have a circular body portion 17from which extends a short arm 18 which bears on the bottom of therecess 5 and an oppositelydisposed long arm 19 the free end of whichbears on the oE-center portion 10 of the spindle heel 9. This spring CZis secured in the recess 5 by a screw 20 through a central hole in thebody 17 of the spring, as shown in Fig. 3.

The lower spindle and bobbin locking spring c is shaped to have acircular body portion 21 from which extends a short arm 22 which bearson the bottom of the recess 7, and an oppositely-disposed long arm 23having the upwardly-turned lip 24 on its free end adapted to engage withthe annular groove 16 in the head 15 of the bobbin, and anupwardly-extending square projection 25 having a fiat top 26 adapt-ed toengage with the fiat bottom 11 of the spindle heel 9, as shown in Fig.3. This locking spring e is secured in the recess 7 by a screw 27through a central hole in the body 21 of the spring. The projection 25may be in the form of a solid block secured to the spring by solder orother means, as shown in Fig. 3, or it may be formed integral with thespring by bending the spring, as shown in the modified form in Fig. l.

The spindle is raised out of the bobbin cavity by the operator againstthe tension of the springs Z and e into the usual position for removingor replacing the bobbins. The oit-center portion 10 of the spindle heel9 now raises the spring d, and the off-center portion 12 on the heeldepresses the spring e, thereby releasing the lip 24C on the spring fromthe groove 16 in the bobbin head 15, when the spindle is raised. Thespindle is held in the shuttle by the tension of the upper spring clbearing on the top of the spindle heel and the tension of the lowerspring e bearing on the bottoni of the spindle heel, thereby reducingthe liability of the spindle jumping out of the shuttle to a minimum.

In practice we find that by the use of our improved construction in loomshuttles the factor of safety is increased about one hundred per cent.as it is extremely improbable for both springs to break simultaneously,and if one spring should break the other spring would have suflicienttension to check the tendency of the spindle in the shuttle to fly outtherefrom until the broken spring is noticed and replaced. Furthermore,the

construction of the leaf spring e with the block or projection 25, whichbears against the face of bottom ll substantially in line with thespindle Z) and closely adjacent the fulcrum of the heel 9, causes saidleaf spring e to bc raised with a quicker movement, when the spindle isswung outwardly, than is the case when the spring bears on a heel whichprojects to or approaches the outer side of the spindle. The elements ofthe spring e, therefore, have the coperat-ive functions of maintainingthe spindle more firmly in its normal axial position, and effecting aquicker and more satisfactory release of the bobbin retaining lip fromthe bobbin when it is desired to remove the latter and the spindle ismoved outwardly.

Having thus described our invention, we

claim as new and desire tovsecure by Letters Patent A loom shuttlespindle lock, comprising, i in combination with a shuttle and a spindlepivoted therein, a heel for said spindle having a flat lower side closeto the pivot point and lying close to the axis of the spindle, anangular offset on the upper side of said heel, a leaf spring recessed insaid shuttle and bearing against said angular offset, a second leafspring recessed in the opposite side of said shuttle and terminating inan inwardly projected lip for engagement with a bobbin, and a projectioncarried by said second spring, said projection extending inwardly towardthe axis of said spindle and having its inner surface flat andbearingwww closely against said flat lower side of said heel, whereby tooffer the resistance of said .50 second spring substantially at saidpivot point and permit a quicker release of said lip from the bobbin.

In testimony whereof we have signed our names to this specification inthe presence of two subscribing witnesses.

JOHN V. CUNNIFF. CHARLES RAFFERTY.

Vitnesses ADA E. HAGERTY, J. A. MILLER.

